title: Weighing in on opioids for chronic pain: the barriers to change.
authors.forename: Daniel P
authors.initials: DP
authors.lastname: Alford
mesh_terms: D000701:Analgesics, Opioid / Q000008:administration & dosage*; D059350:Chronic Pain / Q000188:drug therapy*; D005260:Female; D006801:Humans; D008297:Male; D009020:Morphine / Q000008:administration & dosage*; D009765:Obesity / Q000601:surgery*
chemical_list: D000701:Analgesics, Opioid; D009020:Morphine